Science G10 Week 10

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Across
  1. 4. used to speed up reaction
  2. 7. subatomic particle with no charge
  3. 9. energy levels that surround subatomic particles
  4. 11. horizontal row of periodic table
  5. 13. someone who experimented with gold foil
  6. 14. Group 1, period 3
  7. 15. a man who proposed atomos in 440BCE
  8. 18. collection of particles and heart of an atom
  9. 19. subatomic particles on last shell
  10. 21. subatomic particle with positive charge
  11. 23. substance to slow a reaction
  12. 24. element in group 2, period 7
  13. 25. maximum number the second shell can hold
  14. 26. maximum amount of electrons on first shell
Down
  1. 1. organized chart for the elements
  2. 2. a man who proved substances broke down the same
  3. 3. an element that has the atomic weight of 12.011
  4. 5. burning of a substance
  5. 6. Russian chemist who created the periodic table
  6. 8. object used in famous experiment
  7. 10. element in group 1, period 4
  8. 12. vertical columns of periodic table
  9. 16. an example of oxidation
  10. 17. are lighter or heavier elements at the bottom
  11. 20. group 11, period 4
  12. 22. an element that has the atomic weight of 28.085